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HTC Pico Explorer Stock RUU/ROM Updates

If you want to restore back your HTC Pico Explorer to its original firmware then you need to grab its official RUU updates. Below are list of available Stock ROMs or RUU’s (ROM Update Utility) that can be manually flash or install back to HTC Explorer devices. This can be used to unroot and or restore to official firmware from any customized firmwares.

How to check which is the right RUU for your HTC explorer

You need find out the correct RUU version of your device, each specific build refers the device origins.
To get the RUU version just check the software info in Settings–>About Phone–>Software Version.

How to install RUU

Installing back your HTC Explorer is a bit risky if you are a noob about this method, but it can be easily done just follow this guide here.

!!!DO NOT RELOCK the bootloader before Step 4 – this will brick your phone!!!

1. download RUU for your device here (check your radio at top the bootloader menu)

2. extract the RUU rom from RUU application
start the ruu application, even if it fails. also start the flashing process, nothing will happen here. search for the ruu logs, for me at c:\ruu_log. in the log (for me in line 191) is the path to the rom.zip that should get flashed. something in temp folder… for me the line looks like this:
“fastboot -s HT1BMVMXYZ flash zip C:\users\raangu\AppData\Local\Temp\{1235}\{12345}\ rom.zip”

3. flash the needed images
in the rom.zip you will find a boot_signed.img, a system.img and a recovery_signed.img. flash all these images with fastboot.

Hope you can help, I have been trying to get my THC Pico (explorer) back to a non-custom rom but can’t find the corret RUU, I am in the UK and it was a t-mobile phone. I tried the Europe RUU from the list but to no avail, it comes up with a certificate failed error. I am at noob at this but have followed all the guides to to no joy.

The download page link has been resigned, and this page needs an update. You may only use T-MO’s default RUU, Europe RUU is basically for unbranded variants only, so it fails because yours has a different HBoot/CID version.

Thanks, I checked and it seems there are no RUU’s available online for my phone because it was a T-Mobile HTC Pico Originally which will be why i’m getting the ‘Certificate Failure’ error every time I try any of the generic one’s ‘sigh’ seems I just need to find a custom one that will work with my phone version which, after a lot of attempts seems very few. It looks like, and I could be wrong, that branded phones have a specific hboot that makes it hard to customize it after it’s out of warranty.

I did contact HTC themselves and basically they said that the circuit board would need to be changed, ‘ouch’.